Handbook of Information Security Management
(Publisher: CRC Press LLC)
Author(s): Hal Tipton and Micki Krause, Consulting Editors
ISBN: 0849399475
Publication Date: 01/01/98

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The most successful corporate security policies and procedures address security at three levels, at the management level through high-level policies, at the functional level through security procedures and technical guidelines, and at the end-user level through user awareness and training guidelines. Consider the opportunity to create or update all three when implementing Internet, intranet, and WWW technologies.

Since these new technologies increase the level of risk and vulnerability to your corporate computing and network environment, security policies should probably be beefed up in the areas of audit and monitoring. This is particularly important because security and technical control mechanisms are not mature for the Internet and WWW and therefore more manual processes need to be put in place and mandated to ensure the protection of information.

The distributed nature of Internet, intranet, and WWW and their inherent security risks can be addressed at a more detailed level through an integrated set of policies, procedures, and technical guidelines. Because these policies and processes will be implemented by various functional support areas, there is a great need to obtain by-in from these groups and ensure coordination and integration through all phases of the systems’ life cycle. Individual and collective roles and responsibilities should be clearly delineated to include monitoring and enforcement.

Other areas to consider in the policy update include legal liabilities, risk to competition-sensitive information, employees’ use of company time while “surfing” the Internet, use of company logos and trade names by employees using the Internet, defamation of character involving company employees, loss of trade secrets, loss of the competitive edge, ethical use of the Internet, etc.

DATA CLASSIFICATION SCHEME

A data classification scheme is important to both reflect existing categories of data and introduce any new categories of data needed to support the business use of the Internet, electronic commerce, and information sharing through new intranet and WWW technologies. The whole area of nonemployee access to information changes the approach to categorizing and protecting company information.

The sample chart below (Exhibit 1) is an example of how general to specific categories of company information can be listed, with their corresponding security and protection requirements to be used as a checklist by application, process, and data owners to ensure the appropriated level of protection, and also as a communication tool to functional area support personnel tasked with resource and information protection. A supplemental chart could include application and system names familiar to corporate employees, or types of general applications and information such as payroll, HR, marketing, manufacturing, etc.

Exhibit 1. Sample Data Protection Classification Hierarchy

Note that encryption may not be required for the same level of data classification in the mainframe and proprietary networking environment, but in “open” systems and distributed and global networks transmitted data are much more easily compromised. Security should be applied based on a thorough risk assessment considering the value of the information, the risk introduced by the computing and network environment, the technical control mechanisms feasible or available for implementation, and the ease of administration and management support. Be careful to apply the right “balance” of security. Too much is just as costly and ineffective as too little in most cases.

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